Cal, Lew Horton was a gun dealer in Massachusetts who contracted with S&W for a number of different 'special run' guns. The shop is long gone but his name lives on in obscurity.

Lead wheel weights is still around here, but mostly replaced by zinc weights. My neighbour is in the tyre business and offered me some of their scrap weights but unsorted.

Weighing up time against money I eventually ordered 3% tin and 3% antimony alloy from a commercial lead distributor.